Genetic variability of metabolic characteristics in chickens selected for their ability to digest wheat

De Verdal Hugues, Narcy Agnès, Bastianelli Denis, Même Nathalie, Urvoix Séverine, Collin Anne, Le Bihan-Duval Elisabeth, Mignon-Grasteau Sandrine. 2013. Genetic variability of metabolic characteristics in chickens selected for their ability to digest wheat. Journal of Animal Science, 91 (6) : 2605-2615.

Quartile : Q1, Sujet : AGRICULTURE, DAIRY & ANIMAL SCIENCE

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Improving feed efficiency remains crucial for poultry production. Birds have previously been selected on their ability to digest their diet, as assessed by AMEn (Apparent ME corrected for 0 nitrogen). Such selection, for either a high (D+) or a low AMEn (D-), affects energy, nitrogen, lipid, and starch digestibility. The aim of this study was to establish whether selection on the digestive ability of birds modified metabolic traits. A total of 630 broiler chickens of the eighth generation of a divergent selection experiment on AMEn were used for this purpose. A balance trial was performed to determine energy, nitrogen, and phosphorus retention. Growth performance was recorded and body protein and lipid deposition assessed by breast and abdominal fat yields. Tibia development and mineralization were also studied and heat production was indirectly assessed through the measurement of body temperature during fasting and feeding. Phenotypic correlations estimated within line showed that an increased efficiency was associated to fatter birds and more solid bones in D- but not in D+ line, whereas increased consumption was associated with more solid bones in D+ but not in D- line. The heritability estimates for metabolic traits were relatively high, except for temperature traits (from 0.08 to 0.12), ranging from 0.28 to 0.56 for body composition, and from 0.38 to 0.77 for bone characteristics. Breast meat yield did not differ between the 2 lines whereas a slight increase in abdominal fat yield was observed in the highdigestion line (D+). The relative dry tibia weights and ash weights were greater in D+ birds (+6.56 and +8.06%, respectively) but the lengths and the diameters of the tibia were lower (?7.89 and ?3.77%, respectively). Finally, AMEn was poorly correlated with almost all metabolic traits (ranging from ?0.10 to 0.20), indicating that the ability of the animal to digest its diet is genetically independent of post-digestion metabolic traits.

Mots-clés Agrovoc : poulet, Triticum

Classification Agris : L10 - Génétique et amélioration des animaux
L51 - Physiologie animale - Nutrition

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• De Verdal Hugues, CIRAD-PERSYST-UMR INTREPID (FRA) ORCID: 0000-0002-1923-8575
• Narcy Agnès, INRA (FRA)
• Bastianelli Denis, CIRAD-ES-UMR SELMET (FRA) ORCID: 0000-0002-6394-5920
• Même Nathalie, INRA (FRA)
• Urvoix Séverine, INRA (FRA)
• Collin Anne, INRA (FRA)
• Le Bihan-Duval Elisabeth, INRA (FRA)
• Mignon-Grasteau Sandrine, INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/569219/)

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